I use the Sony HC1 (same tech as the A1U) with two FX1s, and that mostly works fine. The white balance can be a little different but usually corrects okay in post, and performance in dim light is marginal so I put the HC1 away for that. And the overall image quality isn't quite as good, so some experience is useful to determine what shots to take with the lesser camera. But it does work and is useful for b-roll shots.